[Support #SGO-488175]: Re: Latency/Bandwidth issues from idd.unidata ?

Hi Pete,

> I think the flashing/dropouts are definitely related to the zlib compression 
> issue that Peter Neilley, Gilbert and others were discussing on the ldm-users 
> list yesterday. Here are several products from POE (Pendleton, OR) that came 
> through NOAAPort NEXRAD3 just now - note that some do not have the !nids/ at 
> the end, and other do.
> 
> 20220308T182206.031047Z pqutil[39029]               
> pqutil.c:display_watch:1186         INFO      249392 20220308182203.975111 
> NEXRAD3 77105236  SDUS56 KPDT 081821 /pN0BPDT
> 20220308T182741.207206Z pqutil[39029]               
> pqutil.c:display_watch:1186         INFO      249267 20220308182740.607301 
> NEXRAD3 77121470  SDUS56 KPDT 081826 /pN0BPDT !nids/
> 20220308T183318.241367Z pqutil[39029]               
> pqutil.c:display_watch:1186         INFO      249312 20220308183317.372055 
> NEXRAD3 77136749  SDUS56 KPDT 081832 /pN0BPDT !nids/
> 20220308T183856.715622Z pqutil[39029]               
> pqutil.c:display_watch:1186         INFO      250417 20220308183855.807141 
> NEXRAD3 77151637  SDUS56 KPDT 081838 /pN0BPDT
> 20220308T184434.636684Z pqutil[39029]               
> pqutil.c:display_watch:1186         INFO      251450 20220308184433.873383 
> NEXRAD3 77167341  SDUS56 KPDT 081843 /pN0BPDT !nids/
> 
> 
> According to some investigating that Peter was doing yesterday, the ones that 
> don't have the !nids/ at the end have some of the beginnign of the product 
> zlib compressed, while the ones that have the !nids/ at the end don't.

The "nids/" suffix is added by the following code in function "readccb()" in 
file "src/noaaport/readpsh.c":

           /* uncompressed nids check */
        if (psh->pcat == PROD_CAT_NIDS && ccb->user1 != 'F')
            (void)sprintf(psh->ccbdtype,"nids/");

"psh->pcat" is the product category. "ccb" is the NWSTG Communications Code 
Block. I'm still trying to figure that one out.

Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: SGO-488175
Department: Support IDD
Priority: Normal
Status: Closed
===================
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